Greetings. Playing catch-up on things I didn't answer, or answered privately instead of to the list.
The Track Station option just keeps the station on the visible part of the map. It only pans if the station would move off the edge of the map. This is because map re-drawing is expensive, especially on machines like the Raspberry Pi with extremely slow mass storage (the SD card). So I wanted to minimize the map redraws to only when necessary.
Note that, if you are tracking multiple mobile stations that are going off opposite sides of the map, the map may zoom out to keep both stations on the map simultaneously.
There is a new choice on the View menu, the Tracked Station List, which allows you to customize the map behavior on a per-station basis. One useful option there is the Double-Sized Icon; if you are not already using double-sized icons for all stations, this could make it easier to spot tracked stations because they would be drawn larger on the map.
Hope this helps.
Andrew, KA2DDO
author of YAAC